Assume that f(x) is everywhere continuous and it is given to you that f(x) + 5 x-4 It follows that y = lim 2-4 is the equation of the tangent line to y = f(x) at the point Use the given graph of the function to find the x-values for which f is not differentiable. -6 Answer (separate by commas): x = 1,0 -6 1,0 6